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[DUMMY]: Avoid an oops when dummy_init_one() failed
[linux-2.6/linux-mips.git] / net / atm / lec.c
blobb4aa489849dfefc0185395415de8e88c31b303ab
1 /*
2 * lec.c: Lan Emulation driver
3 * Marko Kiiskila mkiiskila@yahoo.com
4 *
5 */
6
7 #include <linux/kernel.h>
8 #include <linux/bitops.h>
9 #include <linux/capability.h>
10
11 /* We are ethernet device */
12 #include <linux/if_ether.h>
13 #include <linux/netdevice.h>
14 #include <linux/etherdevice.h>
15 #include <net/sock.h>
16 #include <linux/skbuff.h>
17 #include <linux/ip.h>
18 #include <asm/byteorder.h>
19 #include <asm/uaccess.h>
20 #include <net/arp.h>
21 #include <net/dst.h>
22 #include <linux/proc_fs.h>
23 #include <linux/spinlock.h>
24 #include <linux/proc_fs.h>
25 #include <linux/seq_file.h>
26
27 /* TokenRing if needed */
28 #ifdef CONFIG_TR
29 #include <linux/trdevice.h>
30 #endif
31
32 /* And atm device */
33 #include <linux/atmdev.h>
34 #include <linux/atmlec.h>
35
36 /* Proxy LEC knows about bridging */
37 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
38 #include <linux/if_bridge.h>
39 #include "../bridge/br_private.h"
40
41 static unsigned char bridge_ula_lec[] = {0x01, 0x80, 0xc2, 0x00, 0x00};
42 #endif
43
44 /* Modular too */
45 #include <linux/module.h>
46 #include <linux/init.h>
47
48 #include "lec.h"
49 #include "lec_arpc.h"
50 #include "resources.h"
51
52 #if 0
53 #define DPRINTK printk
54 #else
55 #define DPRINTK(format,args...)
56 #endif
57
58 #define DUMP_PACKETS 0 /* 0 = None,
59 * 1 = 30 first bytes
60 * 2 = Whole packet
61 */
62
63 #define LEC_UNRES_QUE_LEN 8 /* number of tx packets to queue for a
64 single destination while waiting for SVC */
65
66 static int lec_open(struct net_device *dev);
67 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev);
68 static int lec_close(struct net_device *dev);
69 static struct net_device_stats *lec_get_stats(struct net_device *dev);
70 static void lec_init(struct net_device *dev);
71 static struct lec_arp_table* lec_arp_find(struct lec_priv *priv,
72 unsigned char *mac_addr);
73 static int lec_arp_remove(struct lec_priv *priv,
74 struct lec_arp_table *to_remove);
75 /* LANE2 functions */
76 static void lane2_associate_ind (struct net_device *dev, u8 *mac_address,
77 u8 *tlvs, u32 sizeoftlvs);
78 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
79 u8 **tlvs, u32 *sizeoftlvs);
80 static int lane2_associate_req (struct net_device *dev, u8 *lan_dst,
81 u8 *tlvs, u32 sizeoftlvs);
82
83 static int lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
84 unsigned long permanent);
85 static void lec_arp_check_empties(struct lec_priv *priv,
86 struct atm_vcc *vcc, struct sk_buff *skb);
87 static void lec_arp_destroy(struct lec_priv *priv);
88 static void lec_arp_init(struct lec_priv *priv);
89 static struct atm_vcc* lec_arp_resolve(struct lec_priv *priv,
90 unsigned char *mac_to_find,
91 int is_rdesc,
92 struct lec_arp_table **ret_entry);
93 static void lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
94 unsigned char *atm_addr, unsigned long remoteflag,
95 unsigned int targetless_le_arp);
96 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
97 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
98 static void lec_set_flush_tran_id(struct lec_priv *priv,
99 unsigned char *atm_addr,
100 unsigned long tran_id);
101 static void lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
102 struct atm_vcc *vcc,
103 void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb));
104 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
105
106 static struct lane2_ops lane2_ops = {
107 lane2_resolve, /* resolve, spec 3.1.3 */
108 lane2_associate_req, /* associate_req, spec 3.1.4 */
109 NULL /* associate indicator, spec 3.1.5 */
110 };
111
112 static unsigned char bus_mac[ETH_ALEN] = {0xff,0xff,0xff,0xff,0xff,0xff};
113
114 /* Device structures */
115 static struct net_device *dev_lec[MAX_LEC_ITF];
116
117 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
118 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
119 {
120 struct ethhdr *eth;
121 char *buff;
122 struct lec_priv *priv;
123
124 /* Check if this is a BPDU. If so, ask zeppelin to send
125 * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
126 * as the Config BPDU has */
127 eth = (struct ethhdr *)skb->data;
128 buff = skb->data + skb->dev->hard_header_len;
129 if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
130 struct sock *sk;
131 struct sk_buff *skb2;
132 struct atmlec_msg *mesg;
133
134 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
135 if (skb2 == NULL) return;
136 skb2->len = sizeof(struct atmlec_msg);
137 mesg = (struct atmlec_msg *)skb2->data;
138 mesg->type = l_topology_change;
139 buff += 4;
140 mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */
141
142 priv = (struct lec_priv *)dev->priv;
143 atm_force_charge(priv->lecd, skb2->truesize);
144 sk = sk_atm(priv->lecd);
145 skb_queue_tail(&sk->sk_receive_queue, skb2);
146 sk->sk_data_ready(sk, skb2->len);
147 }
148
149 return;
150 }
151 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
152
153 /*
154 * Modelled after tr_type_trans
155 * All multicast and ARE or STE frames go to BUS.
156 * Non source routed frames go by destination address.
157 * Last hop source routed frames go by destination address.
158 * Not last hop source routed frames go by _next_ route descriptor.
159 * Returns pointer to destination MAC address or fills in rdesc
160 * and returns NULL.
161 */
162 #ifdef CONFIG_TR
163 static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
164 {
165 struct trh_hdr *trh;
166 int riflen, num_rdsc;
167
168 trh = (struct trh_hdr *)packet;
169 if (trh->daddr[0] & (uint8_t)0x80)
170 return bus_mac; /* multicast */
171
172 if (trh->saddr[0] & TR_RII) {
173 riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
174 if ((ntohs(trh->rcf) >> 13) != 0)
175 return bus_mac; /* ARE or STE */
176 }
177 else
178 return trh->daddr; /* not source routed */
179
180 if (riflen < 6)
181 return trh->daddr; /* last hop, source routed */
182
183 /* riflen is 6 or more, packet has more than one route descriptor */
184 num_rdsc = (riflen/2) - 1;
185 memset(rdesc, 0, ETH_ALEN);
186 /* offset 4 comes from LAN destination field in LE control frames */
187 if (trh->rcf & htons((uint16_t)TR_RCF_DIR_BIT))
188 memcpy(&rdesc[4], &trh->rseg[num_rdsc-2], sizeof(uint16_t));
189 else {
190 memcpy(&rdesc[4], &trh->rseg[1], sizeof(uint16_t));
191 rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
192 }
193
194 return NULL;
195 }
196 #endif /* CONFIG_TR */
197
198 /*
199 * Open/initialize the netdevice. This is called (in the current kernel)
200 * sometime after booting when the 'ifconfig' program is run.
201 *
202 * This routine should set everything up anew at each open, even
203 * registers that "should" only need to be set once at boot, so that
204 * there is non-reboot way to recover if something goes wrong.
205 */
206
207 static int
208 lec_open(struct net_device *dev)
209 {
210 struct lec_priv *priv = (struct lec_priv *)dev->priv;
211
212 netif_start_queue(dev);
213 memset(&priv->stats,0,sizeof(struct net_device_stats));
214
215 return 0;
216 }
217
218 static __inline__ void
219 lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv)
220 {
221 ATM_SKB(skb)->vcc = vcc;
222 ATM_SKB(skb)->atm_options = vcc->atm_options;
223
224 atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
225 if (vcc->send(vcc, skb) < 0) {
226 priv->stats.tx_dropped++;
227 return;
228 }
229
230 priv->stats.tx_packets++;
231 priv->stats.tx_bytes += skb->len;
232 }
233
234 static void
235 lec_tx_timeout(struct net_device *dev)
236 {
237 printk(KERN_INFO "%s: tx timeout\n", dev->name);
238 dev->trans_start = jiffies;
239 netif_wake_queue(dev);
240 }
241
242 static int
243 lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
244 {
245 struct sk_buff *skb2;
246 struct lec_priv *priv = (struct lec_priv *)dev->priv;
247 struct lecdatahdr_8023 *lec_h;
248 struct atm_vcc *vcc;
249 struct lec_arp_table *entry;
250 unsigned char *dst;
251 int min_frame_size;
252 #ifdef CONFIG_TR
253 unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */
254 #endif
255 int is_rdesc;
256 #if DUMP_PACKETS > 0
257 char buf[300];
258 int i=0;
259 #endif /* DUMP_PACKETS >0 */
260
261 DPRINTK("lec_start_xmit called\n");
262 if (!priv->lecd) {
263 printk("%s:No lecd attached\n",dev->name);
264 priv->stats.tx_errors++;
265 netif_stop_queue(dev);
266 return -EUNATCH;
267 }
268
269 DPRINTK("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
270 (long)skb->head, (long)skb->data, (long)skb->tail,
271 (long)skb->end);
272 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
273 if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
274 lec_handle_bridge(skb, dev);
275 #endif
276
277 /* Make sure we have room for lec_id */
278 if (skb_headroom(skb) < 2) {
279
280 DPRINTK("lec_start_xmit: reallocating skb\n");
281 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
282 kfree_skb(skb);
283 if (skb2 == NULL) return 0;
284 skb = skb2;
285 }
286 skb_push(skb, 2);
287
288 /* Put le header to place, works for TokenRing too */
289 lec_h = (struct lecdatahdr_8023*)skb->data;
290 lec_h->le_header = htons(priv->lecid);
291
292 #ifdef CONFIG_TR
293 /* Ugly. Use this to realign Token Ring packets for
294 * e.g. PCA-200E driver. */
295 if (priv->is_trdev) {
296 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
297 kfree_skb(skb);
298 if (skb2 == NULL) return 0;
299 skb = skb2;
300 }
301 #endif
302
303 #if DUMP_PACKETS > 0
304 printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
305 skb->len, priv->lecid);
306 #if DUMP_PACKETS >= 2
307 for(i=0;i<skb->len && i <99;i++) {
308 sprintf(buf+i*3,"%2.2x ",0xff&skb->data[i]);
309 }
310 #elif DUMP_PACKETS >= 1
311 for(i=0;i<skb->len && i < 30;i++) {
312 sprintf(buf+i*3,"%2.2x ", 0xff&skb->data[i]);
313 }
314 #endif /* DUMP_PACKETS >= 1 */
315 if (i==skb->len)
316 printk("%s\n",buf);
317 else
318 printk("%s...\n",buf);
319 #endif /* DUMP_PACKETS > 0 */
320
321 /* Minimum ethernet-frame size */
322 #ifdef CONFIG_TR
323 if (priv->is_trdev)
324 min_frame_size = LEC_MINIMUM_8025_SIZE;
325 else
326 #endif
327 min_frame_size = LEC_MINIMUM_8023_SIZE;
328 if (skb->len < min_frame_size) {
329 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
330 skb2 = skb_copy_expand(skb, 0,
331 min_frame_size - skb->truesize, GFP_ATOMIC);
332 dev_kfree_skb(skb);
333 if (skb2 == NULL) {
334 priv->stats.tx_dropped++;
335 return 0;
336 }
337 skb = skb2;
338 }
339 skb_put(skb, min_frame_size - skb->len);
340 }
341
342 /* Send to right vcc */
343 is_rdesc = 0;
344 dst = lec_h->h_dest;
345 #ifdef CONFIG_TR
346 if (priv->is_trdev) {
347 dst = get_tr_dst(skb->data+2, rdesc);
348 if (dst == NULL) {
349 dst = rdesc;
350 is_rdesc = 1;
351 }
352 }
353 #endif
354 entry = NULL;
355 vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
356 DPRINTK("%s:vcc:%p vcc_flags:%x, entry:%p\n", dev->name,
357 vcc, vcc?vcc->flags:0, entry);
358 if (!vcc || !test_bit(ATM_VF_READY,&vcc->flags)) {
359 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
360 DPRINTK("%s:lec_start_xmit: queuing packet, ", dev->name);
361 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
362 lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
363 lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
364 skb_queue_tail(&entry->tx_wait, skb);
365 } else {
366 DPRINTK("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ", dev->name);
367 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
368 lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
369 lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
370 priv->stats.tx_dropped++;
371 dev_kfree_skb(skb);
372 }
373 return 0;
374 }
375
376 #if DUMP_PACKETS > 0
377 printk("%s:sending to vpi:%d vci:%d\n", dev->name,
378 vcc->vpi, vcc->vci);
379 #endif /* DUMP_PACKETS > 0 */
380
381 while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
382 DPRINTK("lec.c: emptying tx queue, ");
383 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
384 lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
385 lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
386 lec_send(vcc, skb2, priv);
387 }
388
389 lec_send(vcc, skb, priv);
390
391 if (!atm_may_send(vcc, 0)) {
392 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
393
394 vpriv->xoff = 1;
395 netif_stop_queue(dev);
396
397 /*
398 * vcc->pop() might have occurred in between, making
399 * the vcc usuable again. Since xmit is serialized,
400 * this is the only situation we have to re-test.
401 */
402
403 if (atm_may_send(vcc, 0))
404 netif_wake_queue(dev);
405 }
406
407 dev->trans_start = jiffies;
408 return 0;
409 }
410
411 /* The inverse routine to net_open(). */
412 static int
413 lec_close(struct net_device *dev)
414 {
415 netif_stop_queue(dev);
416 return 0;
417 }
418
419 /*
420 * Get the current statistics.
421 * This may be called with the card open or closed.
422 */
423 static struct net_device_stats *
424 lec_get_stats(struct net_device *dev)
425 {
426 return &((struct lec_priv *)dev->priv)->stats;
427 }
428
429 static int
430 lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
431 {
432 unsigned long flags;
433 struct net_device *dev = (struct net_device*)vcc->proto_data;
434 struct lec_priv *priv = (struct lec_priv*)dev->priv;
435 struct atmlec_msg *mesg;
436 struct lec_arp_table *entry;
437 int i;
438 char *tmp; /* FIXME */
439
440 atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
441 mesg = (struct atmlec_msg *)skb->data;
442 tmp = skb->data;
443 tmp += sizeof(struct atmlec_msg);
444 DPRINTK("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
445 switch(mesg->type) {
446 case l_set_mac_addr:
447 for (i=0;i<6;i++) {
448 dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
449 }
450 break;
451 case l_del_mac_addr:
452 for(i=0;i<6;i++) {
453 dev->dev_addr[i] = 0;
454 }
455 break;
456 case l_addr_delete:
457 lec_addr_delete(priv, mesg->content.normal.atm_addr,
458 mesg->content.normal.flag);
459 break;
460 case l_topology_change:
461 priv->topology_change = mesg->content.normal.flag;
462 break;
463 case l_flush_complete:
464 lec_flush_complete(priv, mesg->content.normal.flag);
465 break;
466 case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
467 spin_lock_irqsave(&priv->lec_arp_lock, flags);
468 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
469 lec_arp_remove(priv, entry);
470 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
471
472 if (mesg->content.normal.no_source_le_narp)
473 break;
474 /* FALL THROUGH */
475 case l_arp_update:
476 lec_arp_update(priv, mesg->content.normal.mac_addr,
477 mesg->content.normal.atm_addr,
478 mesg->content.normal.flag,
479 mesg->content.normal.targetless_le_arp);
480 DPRINTK("lec: in l_arp_update\n");
481 if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
482 DPRINTK("lec: LANE2 3.1.5, got tlvs, size %d\n", mesg->sizeoftlvs);
483 lane2_associate_ind(dev,
484 mesg->content.normal.mac_addr,
485 tmp, mesg->sizeoftlvs);
486 }
487 break;
488 case l_config:
489 priv->maximum_unknown_frame_count =
490 mesg->content.config.maximum_unknown_frame_count;
491 priv->max_unknown_frame_time =
492 (mesg->content.config.max_unknown_frame_time*HZ);
493 priv->max_retry_count =
494 mesg->content.config.max_retry_count;
495 priv->aging_time = (mesg->content.config.aging_time*HZ);
496 priv->forward_delay_time =
497 (mesg->content.config.forward_delay_time*HZ);
498 priv->arp_response_time =
499 (mesg->content.config.arp_response_time*HZ);
500 priv->flush_timeout = (mesg->content.config.flush_timeout*HZ);
501 priv->path_switching_delay =
502 (mesg->content.config.path_switching_delay*HZ);
503 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */
504 priv->lane2_ops = NULL;
505 if (priv->lane_version > 1)
506 priv->lane2_ops = &lane2_ops;
507 if (dev->change_mtu(dev, mesg->content.config.mtu))
508 printk("%s: change_mtu to %d failed\n", dev->name,
509 mesg->content.config.mtu);
510 priv->is_proxy = mesg->content.config.is_proxy;
511 break;
512 case l_flush_tran_id:
513 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
514 mesg->content.normal.flag);
515 break;
516 case l_set_lecid:
517 priv->lecid=(unsigned short)(0xffff&mesg->content.normal.flag);
518 break;
519 case l_should_bridge: {
520 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
521 struct net_bridge_fdb_entry *f;
522
523 DPRINTK("%s: bridge zeppelin asks about 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
524 dev->name,
525 mesg->content.proxy.mac_addr[0], mesg->content.proxy.mac_addr[1],
526 mesg->content.proxy.mac_addr[2], mesg->content.proxy.mac_addr[3],
527 mesg->content.proxy.mac_addr[4], mesg->content.proxy.mac_addr[5]);
528
529 if (br_fdb_get_hook == NULL || dev->br_port == NULL)
530 break;
531
532 f = br_fdb_get_hook(dev->br_port->br, mesg->content.proxy.mac_addr);
533 if (f != NULL &&
534 f->dst->dev != dev &&
535 f->dst->state == BR_STATE_FORWARDING) {
536 /* hit from bridge table, send LE_ARP_RESPONSE */
537 struct sk_buff *skb2;
538 struct sock *sk;
539
540 DPRINTK("%s: entry found, responding to zeppelin\n", dev->name);
541 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
542 if (skb2 == NULL) {
543 br_fdb_put_hook(f);
544 break;
545 }
546 skb2->len = sizeof(struct atmlec_msg);
547 memcpy(skb2->data, mesg, sizeof(struct atmlec_msg));
548 atm_force_charge(priv->lecd, skb2->truesize);
549 sk = sk_atm(priv->lecd);
550 skb_queue_tail(&sk->sk_receive_queue, skb2);
551 sk->sk_data_ready(sk, skb2->len);
552 }
553 if (f != NULL) br_fdb_put_hook(f);
554 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
555 }
556 break;
557 default:
558 printk("%s: Unknown message type %d\n", dev->name, mesg->type);
559 dev_kfree_skb(skb);
560 return -EINVAL;
561 }
562 dev_kfree_skb(skb);
563 return 0;
564 }
565
566 static void
567 lec_atm_close(struct atm_vcc *vcc)
568 {
569 struct sk_buff *skb;
570 struct net_device *dev = (struct net_device *)vcc->proto_data;
571 struct lec_priv *priv = (struct lec_priv *)dev->priv;
572
573 priv->lecd = NULL;
574 /* Do something needful? */
575
576 netif_stop_queue(dev);
577 lec_arp_destroy(priv);
578
579 if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
580 printk("%s lec_atm_close: closing with messages pending\n",
581 dev->name);
582 while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) {
583 atm_return(vcc, skb->truesize);
584 dev_kfree_skb(skb);
585 }
586
587 printk("%s: Shut down!\n", dev->name);
588 module_put(THIS_MODULE);
589 }
590
591 static struct atmdev_ops lecdev_ops = {
592 .close = lec_atm_close,
593 .send = lec_atm_send
594 };
595
596 static struct atm_dev lecatm_dev = {
597 .ops = &lecdev_ops,
598 .type = "lec",
599 .number = 999, /* dummy device number */
600 .lock = SPIN_LOCK_UNLOCKED
601 };
602
603 /*
604 * LANE2: new argument struct sk_buff *data contains
605 * the LE_ARP based TLVs introduced in the LANE2 spec
606 */
607 static int
608 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
609 unsigned char *mac_addr, unsigned char *atm_addr,
610 struct sk_buff *data)
611 {
612 struct sock *sk;
613 struct sk_buff *skb;
614 struct atmlec_msg *mesg;
615
616 if (!priv || !priv->lecd) {
617 return -1;
618 }
619 skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
620 if (!skb)
621 return -1;
622 skb->len = sizeof(struct atmlec_msg);
623 mesg = (struct atmlec_msg *)skb->data;
624 memset(mesg, 0, sizeof(struct atmlec_msg));
625 mesg->type = type;
626 if (data != NULL)
627 mesg->sizeoftlvs = data->len;
628 if (mac_addr)
629 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
630 else
631 mesg->content.normal.targetless_le_arp = 1;
632 if (atm_addr)
633 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
634
635 atm_force_charge(priv->lecd, skb->truesize);
636 sk = sk_atm(priv->lecd);
637 skb_queue_tail(&sk->sk_receive_queue, skb);
638 sk->sk_data_ready(sk, skb->len);
639
640 if (data != NULL) {
641 DPRINTK("lec: about to send %d bytes of data\n", data->len);
642 atm_force_charge(priv->lecd, data->truesize);
643 skb_queue_tail(&sk->sk_receive_queue, data);
644 sk->sk_data_ready(sk, skb->len);
645 }
646
647 return 0;
648 }
649
650 /* shamelessly stolen from drivers/net/net_init.c */
651 static int lec_change_mtu(struct net_device *dev, int new_mtu)
652 {
653 if ((new_mtu < 68) || (new_mtu > 18190))
654 return -EINVAL;
655 dev->mtu = new_mtu;
656 return 0;
657 }
658
659 static void lec_set_multicast_list(struct net_device *dev)
660 {
661 /* by default, all multicast frames arrive over the bus.
662 * eventually support selective multicast service
663 */
664 return;
665 }
666
667 static void
668 lec_init(struct net_device *dev)
669 {
670 dev->change_mtu = lec_change_mtu;
671 dev->open = lec_open;
672 dev->stop = lec_close;
673 dev->hard_start_xmit = lec_start_xmit;
674 dev->tx_timeout = lec_tx_timeout;
675
676 dev->get_stats = lec_get_stats;
677 dev->set_multicast_list = lec_set_multicast_list;
678 dev->do_ioctl = NULL;
679 printk("%s: Initialized!\n",dev->name);
680 return;
681 }
682
683 static unsigned char lec_ctrl_magic[] = {
684 0xff,
685 0x00,
686 0x01,
687 0x01 };
688
689 #define LEC_DATA_DIRECT_8023 2
690 #define LEC_DATA_DIRECT_8025 3
691
692 static int lec_is_data_direct(struct atm_vcc *vcc)
693 {
694 return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
695 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
696 }
697
698 static void
699 lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
700 {
701 unsigned long flags;
702 struct net_device *dev = (struct net_device *)vcc->proto_data;
703 struct lec_priv *priv = (struct lec_priv *)dev->priv;
704
705 #if DUMP_PACKETS >0
706 int i=0;
707 char buf[300];
708
709 printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name,
710 vcc->vpi, vcc->vci);
711 #endif
712 if (!skb) {
713 DPRINTK("%s: null skb\n",dev->name);
714 lec_vcc_close(priv, vcc);
715 return;
716 }
717 #if DUMP_PACKETS > 0
718 printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name,
719 skb->len, priv->lecid);
720 #if DUMP_PACKETS >= 2
721 for(i=0;i<skb->len && i <99;i++) {
722 sprintf(buf+i*3,"%2.2x ",0xff&skb->data[i]);
723 }
724 #elif DUMP_PACKETS >= 1
725 for(i=0;i<skb->len && i < 30;i++) {
726 sprintf(buf+i*3,"%2.2x ", 0xff&skb->data[i]);
727 }
728 #endif /* DUMP_PACKETS >= 1 */
729 if (i==skb->len)
730 printk("%s\n",buf);
731 else
732 printk("%s...\n",buf);
733 #endif /* DUMP_PACKETS > 0 */
734 if (memcmp(skb->data, lec_ctrl_magic, 4) ==0) { /* Control frame, to daemon*/
735 struct sock *sk = sk_atm(vcc);
736
737 DPRINTK("%s: To daemon\n",dev->name);
738 skb_queue_tail(&sk->sk_receive_queue, skb);
739 sk->sk_data_ready(sk, skb->len);
740 } else { /* Data frame, queue to protocol handlers */
741 struct lec_arp_table *entry;
742 unsigned char *src, *dst;
743
744 atm_return(vcc,skb->truesize);
745 if (*(uint16_t *)skb->data == htons(priv->lecid) ||
746 !priv->lecd ||
747 !(dev->flags & IFF_UP)) {
748 /* Probably looping back, or if lecd is missing,
749 lecd has gone down */
750 DPRINTK("Ignoring frame...\n");
751 dev_kfree_skb(skb);
752 return;
753 }
754 #ifdef CONFIG_TR
755 if (priv->is_trdev)
756 dst = ((struct lecdatahdr_8025 *) skb->data)->h_dest;
757 else
758 #endif
759 dst = ((struct lecdatahdr_8023 *) skb->data)->h_dest;
760
761 /* If this is a Data Direct VCC, and the VCC does not match
762 * the LE_ARP cache entry, delete the LE_ARP cache entry.
763 */
764 spin_lock_irqsave(&priv->lec_arp_lock, flags);
765 if (lec_is_data_direct(vcc)) {
766 #ifdef CONFIG_TR
767 if (priv->is_trdev)
768 src = ((struct lecdatahdr_8025 *) skb->data)->h_source;
769 else
770 #endif
771 src = ((struct lecdatahdr_8023 *) skb->data)->h_source;
772 entry = lec_arp_find(priv, src);
773 if (entry && entry->vcc != vcc) {
774 lec_arp_remove(priv, entry);
775 kfree(entry);
776 }
777 }
778 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
779
780 if (!(dst[0]&0x01) && /* Never filter Multi/Broadcast */
781 !priv->is_proxy && /* Proxy wants all the packets */
782 memcmp(dst, dev->dev_addr, dev->addr_len)) {
783 dev_kfree_skb(skb);
784 return;
785 }
786 if (priv->lec_arp_empty_ones) {
787 lec_arp_check_empties(priv, vcc, skb);
788 }
789 skb->dev = dev;
790 skb_pull(skb, 2); /* skip lec_id */
791 #ifdef CONFIG_TR
792 if (priv->is_trdev) skb->protocol = tr_type_trans(skb, dev);
793 else
794 #endif
795 skb->protocol = eth_type_trans(skb, dev);
796 priv->stats.rx_packets++;
797 priv->stats.rx_bytes += skb->len;
798 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
799 netif_rx(skb);
800 }
801 }
802
803 static void
804 lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
805 {
806 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
807 struct net_device *dev = skb->dev;
808
809 if (vpriv == NULL) {
810 printk("lec_pop(): vpriv = NULL!?!?!?\n");
811 return;
812 }
813
814 vpriv->old_pop(vcc, skb);
815
816 if (vpriv->xoff && atm_may_send(vcc, 0)) {
817 vpriv->xoff = 0;
818 if (netif_running(dev) && netif_queue_stopped(dev))
819 netif_wake_queue(dev);
820 }
821 }
822
823 static int
824 lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
825 {
826 struct lec_vcc_priv *vpriv;
827 int bytes_left;
828 struct atmlec_ioc ioc_data;
829
830 /* Lecd must be up in this case */
831 bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
832 if (bytes_left != 0) {
833 printk("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
834 bytes_left);
835 }
836 if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
837 !dev_lec[ioc_data.dev_num])
838 return -EINVAL;
839 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
840 return -ENOMEM;
841 vpriv->xoff = 0;
842 vpriv->old_pop = vcc->pop;
843 vcc->user_back = vpriv;
844 vcc->pop = lec_pop;
845 lec_vcc_added(dev_lec[ioc_data.dev_num]->priv,
846 &ioc_data, vcc, vcc->push);
847 vcc->proto_data = dev_lec[ioc_data.dev_num];
848 vcc->push = lec_push;
849 return 0;
850 }
851
852 static int
853 lec_mcast_attach(struct atm_vcc *vcc, int arg)
854 {
855 if (arg <0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
856 return -EINVAL;
857 vcc->proto_data = dev_lec[arg];
858 return (lec_mcast_make((struct lec_priv*)dev_lec[arg]->priv, vcc));
859 }
860
861 /* Initialize device. */
862 static int
863 lecd_attach(struct atm_vcc *vcc, int arg)
864 {
865 int i;
866 struct lec_priv *priv;
867
868 if (arg<0)
869 i = 0;
870 else
871 i = arg;
872 #ifdef CONFIG_TR
873 if (arg >= MAX_LEC_ITF)
874 return -EINVAL;
875 #else /* Reserve the top NUM_TR_DEVS for TR */
876 if (arg >= (MAX_LEC_ITF-NUM_TR_DEVS))
877 return -EINVAL;
878 #endif
879 if (!dev_lec[i]) {
880 int is_trdev, size;
881
882 is_trdev = 0;
883 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
884 is_trdev = 1;
885
886 size = sizeof(struct lec_priv);
887 #ifdef CONFIG_TR
888 if (is_trdev)
889 dev_lec[i] = alloc_trdev(size);
890 else
891 #endif
892 dev_lec[i] = alloc_etherdev(size);
893 if (!dev_lec[i])
894 return -ENOMEM;
895 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
896 if (register_netdev(dev_lec[i])) {
897 free_netdev(dev_lec[i]);
898 return -EINVAL;
899 }
900
901 priv = dev_lec[i]->priv;
902 priv->is_trdev = is_trdev;
903 lec_init(dev_lec[i]);
904 } else {
905 priv = dev_lec[i]->priv;
906 if (priv->lecd)
907 return -EADDRINUSE;
908 }
909 lec_arp_init(priv);
910 priv->itfnum = i; /* LANE2 addition */
911 priv->lecd = vcc;
912 vcc->dev = &lecatm_dev;
913 vcc_insert_socket(sk_atm(vcc));
914
915 vcc->proto_data = dev_lec[i];
916 set_bit(ATM_VF_META,&vcc->flags);
917 set_bit(ATM_VF_READY,&vcc->flags);
918
919 /* Set default values to these variables */
920 priv->maximum_unknown_frame_count = 1;
921 priv->max_unknown_frame_time = (1*HZ);
922 priv->vcc_timeout_period = (1200*HZ);
923 priv->max_retry_count = 1;
924 priv->aging_time = (300*HZ);
925 priv->forward_delay_time = (15*HZ);
926 priv->topology_change = 0;
927 priv->arp_response_time = (1*HZ);
928 priv->flush_timeout = (4*HZ);
929 priv->path_switching_delay = (6*HZ);
930
931 if (dev_lec[i]->flags & IFF_UP) {
932 netif_start_queue(dev_lec[i]);
933 }
934 __module_get(THIS_MODULE);
935 return i;
936 }
937
938 #ifdef CONFIG_PROC_FS
939 static char* lec_arp_get_status_string(unsigned char status)
940 {
941 static char *lec_arp_status_string[] = {
942 "ESI_UNKNOWN ",
943 "ESI_ARP_PENDING ",
944 "ESI_VC_PENDING ",
945 "<Undefined> ",
946 "ESI_FLUSH_PENDING ",
947 "ESI_FORWARD_DIRECT"
948 };
949
950 if (status > ESI_FORWARD_DIRECT)
951 status = 3; /* ESI_UNDEFINED */
952 return lec_arp_status_string[status];
953 }
954
955 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
956 {
957 int i;
958
959 for (i = 0; i < ETH_ALEN; i++)
960 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
961 seq_printf(seq, " ");
962 for (i = 0; i < ATM_ESA_LEN; i++)
963 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
964 seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
965 entry->flags & 0xffff);
966 if (entry->vcc)
967 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
968 else
969 seq_printf(seq, " ");
970 if (entry->recv_vcc) {
971 seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
972 entry->recv_vcc->vci);
973 }
974 seq_putc(seq, '\n');
975 }
976
977
978 struct lec_state {
979 unsigned long flags;
980 struct lec_priv *locked;
981 struct lec_arp_table *entry;
982 struct net_device *dev;
983 int itf;
984 int arp_table;
985 int misc_table;
986 };
987
988 static void *lec_tbl_walk(struct lec_state *state, struct lec_arp_table *tbl,
989 loff_t *l)
990 {
991 struct lec_arp_table *e = state->entry;
992
993 if (!e)
994 e = tbl;
995 if (e == (void *)1) {
996 e = tbl;
997 --*l;
998 }
999 for (; e; e = e->next) {
1000 if (--*l < 0)
1001 break;
1002 }
1003 state->entry = e;
1004 return (*l < 0) ? state : NULL;
1005 }
1006
1007 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
1008 struct lec_priv *priv)
1009 {
1010 void *v = NULL;
1011 int p;
1012
1013 for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
1014 v = lec_tbl_walk(state, priv->lec_arp_tables[p], l);
1015 if (v)
1016 break;
1017 }
1018 state->arp_table = p;
1019 return v;
1020 }
1021
1022 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
1023 struct lec_priv *priv)
1024 {
1025 struct lec_arp_table *lec_misc_tables[] = {
1026 priv->lec_arp_empty_ones,
1027 priv->lec_no_forward,
1028 priv->mcast_fwds
1029 };
1030 void *v = NULL;
1031 int q;
1032
1033 for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
1034 v = lec_tbl_walk(state, lec_misc_tables[q], l);
1035 if (v)
1036 break;
1037 }
1038 state->misc_table = q;
1039 return v;
1040 }
1041
1042 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
1043 struct lec_priv *priv)
1044 {
1045 if (!state->locked) {
1046 state->locked = priv;
1047 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
1048 }
1049 if (!lec_arp_walk(state, l, priv) &&
1050 !lec_misc_walk(state, l, priv)) {
1051 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
1052 state->locked = NULL;
1053 /* Partial state reset for the next time we get called */
1054 state->arp_table = state->misc_table = 0;
1055 }
1056 return state->locked;
1057 }
1058
1059 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
1060 {
1061 struct net_device *dev;
1062 void *v;
1063
1064 dev = state->dev ? state->dev : dev_lec[state->itf];
1065 v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL;
1066 if (!v && dev) {
1067 dev_put(dev);
1068 /* Partial state reset for the next time we get called */
1069 dev = NULL;
1070 }
1071 state->dev = dev;
1072 return v;
1073 }
1074
1075 static void *lec_get_idx(struct lec_state *state, loff_t l)
1076 {
1077 void *v = NULL;
1078
1079 for (; state->itf < MAX_LEC_ITF; state->itf++) {
1080 v = lec_itf_walk(state, &l);
1081 if (v)
1082 break;
1083 }
1084 return v;
1085 }
1086
1087 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
1088 {
1089 struct lec_state *state = seq->private;
1090
1091 state->itf = 0;
1092 state->dev = NULL;
1093 state->locked = NULL;
1094 state->arp_table = 0;
1095 state->misc_table = 0;
1096 state->entry = (void *)1;
1097
1098 return *pos ? lec_get_idx(state, *pos) : (void*)1;
1099 }
1100
1101 static void lec_seq_stop(struct seq_file *seq, void *v)
1102 {
1103 struct lec_state *state = seq->private;
1104
1105 if (state->dev) {
1106 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
1107 state->flags);
1108 dev_put(state->dev);
1109 }
1110 }
1111
1112 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1113 {
1114 struct lec_state *state = seq->private;
1115
1116 v = lec_get_idx(state, 1);
1117 *pos += !!PTR_ERR(v);
1118 return v;
1119 }
1120
1121 static int lec_seq_show(struct seq_file *seq, void *v)
1122 {
1123 static char lec_banner[] = "Itf MAC ATM destination"
1124 " Status Flags "
1125 "VPI/VCI Recv VPI/VCI\n";
1126
1127 if (v == (void *)1)
1128 seq_puts(seq, lec_banner);
1129 else {
1130 struct lec_state *state = seq->private;
1131 struct net_device *dev = state->dev;
1132
1133 seq_printf(seq, "%s ", dev->name);
1134 lec_info(seq, state->entry);
1135 }
1136 return 0;
1137 }
1138
1139 static struct seq_operations lec_seq_ops = {
1140 .start = lec_seq_start,
1141 .next = lec_seq_next,
1142 .stop = lec_seq_stop,
1143 .show = lec_seq_show,
1144 };
1145
1146 static int lec_seq_open(struct inode *inode, struct file *file)
1147 {
1148 struct lec_state *state;
1149 struct seq_file *seq;
1150 int rc = -EAGAIN;
1151
1152 state = kmalloc(sizeof(*state), GFP_KERNEL);
1153 if (!state) {
1154 rc = -ENOMEM;
1155 goto out;
1156 }
1157
1158 rc = seq_open(file, &lec_seq_ops);
1159 if (rc)
1160 goto out_kfree;
1161 seq = file->private_data;
1162 seq->private = state;
1163 out:
1164 return rc;
1165
1166 out_kfree:
1167 kfree(state);
1168 goto out;
1169 }
1170
1171 static int lec_seq_release(struct inode *inode, struct file *file)
1172 {
1173 return seq_release_private(inode, file);
1174 }
1175
1176 static struct file_operations lec_seq_fops = {
1177 .owner = THIS_MODULE,
1178 .open = lec_seq_open,
1179 .read = seq_read,
1180 .llseek = seq_lseek,
1181 .release = lec_seq_release,
1182 };
1183 #endif
1184
1185 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1186 {
1187 struct atm_vcc *vcc = ATM_SD(sock);
1188 int err = 0;
1189
1190 switch (cmd) {
1191 case ATMLEC_CTRL:
1192 case ATMLEC_MCAST:
1193 case ATMLEC_DATA:
1194 if (!capable(CAP_NET_ADMIN))
1195 return -EPERM;
1196 break;
1197 default:
1198 return -ENOIOCTLCMD;
1199 }
1200
1201 switch (cmd) {
1202 case ATMLEC_CTRL:
1203 err = lecd_attach(vcc, (int) arg);
1204 if (err >= 0)
1205 sock->state = SS_CONNECTED;
1206 break;
1207 case ATMLEC_MCAST:
1208 err = lec_mcast_attach(vcc, (int) arg);
1209 break;
1210 case ATMLEC_DATA:
1211 err = lec_vcc_attach(vcc, (void __user *) arg);
1212 break;
1213 }
1214
1215 return err;
1216 }
1217
1218 static struct atm_ioctl lane_ioctl_ops = {
1219 .owner = THIS_MODULE,
1220 .ioctl = lane_ioctl,
1221 };
1222
1223 static int __init lane_module_init(void)
1224 {
1225 #ifdef CONFIG_PROC_FS
1226 struct proc_dir_entry *p;
1227
1228 p = create_proc_entry("lec", S_IRUGO, atm_proc_root);
1229 if (p)
1230 p->proc_fops = &lec_seq_fops;
1231 #endif
1232
1233 register_atm_ioctl(&lane_ioctl_ops);
1234 printk("lec.c: " __DATE__ " " __TIME__ " initialized\n");
1235 return 0;
1236 }
1237
1238 static void __exit lane_module_cleanup(void)
1239 {
1240 int i;
1241 struct lec_priv *priv;
1242
1243 remove_proc_entry("lec", atm_proc_root);
1244
1245 deregister_atm_ioctl(&lane_ioctl_ops);
1246
1247 for (i = 0; i < MAX_LEC_ITF; i++) {
1248 if (dev_lec[i] != NULL) {
1249 priv = (struct lec_priv *)dev_lec[i]->priv;
1250 unregister_netdev(dev_lec[i]);
1251 free_netdev(dev_lec[i]);
1252 dev_lec[i] = NULL;
1253 }
1254 }
1255
1256 return;
1257 }
1258
1259 module_init(lane_module_init);
1260 module_exit(lane_module_cleanup);
1261
1262 /*
1263 * LANE2: 3.1.3, LE_RESOLVE.request
1264 * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1265 * If sizeoftlvs == NULL the default TLVs associated with with this
1266 * lec will be used.
1267 * If dst_mac == NULL, targetless LE_ARP will be sent
1268 */
1269 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
1270 u8 **tlvs, u32 *sizeoftlvs)
1271 {
1272 unsigned long flags;
1273 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1274 struct lec_arp_table *table;
1275 struct sk_buff *skb;
1276 int retval;
1277
1278 if (force == 0) {
1279 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1280 table = lec_arp_find(priv, dst_mac);
1281 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1282 if(table == NULL)
1283 return -1;
1284
1285 *tlvs = kmalloc(table->sizeoftlvs, GFP_ATOMIC);
1286 if (*tlvs == NULL)
1287 return -1;
1288
1289 memcpy(*tlvs, table->tlvs, table->sizeoftlvs);
1290 *sizeoftlvs = table->sizeoftlvs;
1291
1292 return 0;
1293 }
1294
1295 if (sizeoftlvs == NULL)
1296 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1297
1298 else {
1299 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1300 if (skb == NULL)
1301 return -1;
1302 skb->len = *sizeoftlvs;
1303 memcpy(skb->data, *tlvs, *sizeoftlvs);
1304 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1305 }
1306 return retval;
1307 }
1308
1309
1310 /*
1311 * LANE2: 3.1.4, LE_ASSOCIATE.request
1312 * Associate the *tlvs with the *lan_dst address.
1313 * Will overwrite any previous association
1314 * Returns 1 for success, 0 for failure (out of memory)
1315 *
1316 */
1317 static int lane2_associate_req (struct net_device *dev, u8 *lan_dst,
1318 u8 *tlvs, u32 sizeoftlvs)
1319 {
1320 int retval;
1321 struct sk_buff *skb;
1322 struct lec_priv *priv = (struct lec_priv*)dev->priv;
1323
1324 if (compare_ether_addr(lan_dst, dev->dev_addr))
1325 return (0); /* not our mac address */
1326
1327 kfree(priv->tlvs); /* NULL if there was no previous association */
1328
1329 priv->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL);
1330 if (priv->tlvs == NULL)
1331 return (0);
1332 priv->sizeoftlvs = sizeoftlvs;
1333 memcpy(priv->tlvs, tlvs, sizeoftlvs);
1334
1335 skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1336 if (skb == NULL)
1337 return 0;
1338 skb->len = sizeoftlvs;
1339 memcpy(skb->data, tlvs, sizeoftlvs);
1340 retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1341 if (retval != 0)
1342 printk("lec.c: lane2_associate_req() failed\n");
1343 /* If the previous association has changed we must
1344 * somehow notify other LANE entities about the change
1345 */
1346 return (1);
1347 }
1348
1349 /*
1350 * LANE2: 3.1.5, LE_ASSOCIATE.indication
1351 *
1352 */
1353 static void lane2_associate_ind (struct net_device *dev, u8 *mac_addr,
1354 u8 *tlvs, u32 sizeoftlvs)
1355 {
1356 #if 0
1357 int i = 0;
1358 #endif
1359 struct lec_priv *priv = (struct lec_priv *)dev->priv;
1360 #if 0 /* Why have the TLVs in LE_ARP entries since we do not use them? When you
1361 uncomment this code, make sure the TLVs get freed when entry is killed */
1362 struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1363
1364 if (entry == NULL)
1365 return; /* should not happen */
1366
1367 kfree(entry->tlvs);
1368
1369 entry->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL);
1370 if (entry->tlvs == NULL)
1371 return;
1372
1373 entry->sizeoftlvs = sizeoftlvs;
1374 memcpy(entry->tlvs, tlvs, sizeoftlvs);
1375 #endif
1376 #if 0
1377 printk("lec.c: lane2_associate_ind()\n");
1378 printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1379 while (i < sizeoftlvs)
1380 printk("%02x ", tlvs[i++]);
1381
1382 printk("\n");
1383 #endif
1384
1385 /* tell MPOA about the TLVs we saw */
1386 if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1387 priv->lane2_ops->associate_indicator(dev, mac_addr,
1388 tlvs, sizeoftlvs);
1389 }
1390 return;
1391 }
1392
1393 /*
1394 * Here starts what used to lec_arpc.c
1395 *
1396 * lec_arpc.c was added here when making
1397 * lane client modular. October 1997
1398 *
1399 */
1400
1401 #include <linux/types.h>
1402 #include <linux/sched.h>
1403 #include <linux/timer.h>
1404 #include <asm/param.h>
1405 #include <asm/atomic.h>
1406 #include <linux/inetdevice.h>
1407 #include <net/route.h>
1408
1409
1410 #if 0
1411 #define DPRINTK(format,args...)
1412 /*
1413 #define DPRINTK printk
1414 */
1415 #endif
1416 #define DEBUG_ARP_TABLE 0
1417
1418 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1419
1420 static void lec_arp_check_expire(unsigned long data);
1421 static void lec_arp_expire_arp(unsigned long data);
1422
1423 /*
1424 * Arp table funcs
1425 */
1426
1427 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
1428
1429 /*
1430 * Initialization of arp-cache
1431 */
1432 static void
1433 lec_arp_init(struct lec_priv *priv)
1434 {
1435 unsigned short i;
1436
1437 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1438 priv->lec_arp_tables[i] = NULL;
1439 }
1440 spin_lock_init(&priv->lec_arp_lock);
1441 init_timer(&priv->lec_arp_timer);
1442 priv->lec_arp_timer.expires = jiffies + LEC_ARP_REFRESH_INTERVAL;
1443 priv->lec_arp_timer.data = (unsigned long)priv;
1444 priv->lec_arp_timer.function = lec_arp_check_expire;
1445 add_timer(&priv->lec_arp_timer);
1446 }
1447
1448 static void
1449 lec_arp_clear_vccs(struct lec_arp_table *entry)
1450 {
1451 if (entry->vcc) {
1452 struct atm_vcc *vcc = entry->vcc;
1453 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1454 struct net_device *dev = (struct net_device*) vcc->proto_data;
1455
1456 vcc->pop = vpriv->old_pop;
1457 if (vpriv->xoff)
1458 netif_wake_queue(dev);
1459 kfree(vpriv);
1460 vcc->user_back = NULL;
1461 vcc->push = entry->old_push;
1462 vcc_release_async(vcc, -EPIPE);
1463 vcc = NULL;
1464 }
1465 if (entry->recv_vcc) {
1466 entry->recv_vcc->push = entry->old_recv_push;
1467 vcc_release_async(entry->recv_vcc, -EPIPE);
1468 entry->recv_vcc = NULL;
1469 }
1470 }
1471
1472 /*
1473 * Insert entry to lec_arp_table
1474 * LANE2: Add to the end of the list to satisfy 8.1.13
1475 */
1476 static inline void
1477 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *to_add)
1478 {
1479 unsigned short place;
1480 struct lec_arp_table *tmp;
1481
1482 place = HASH(to_add->mac_addr[ETH_ALEN-1]);
1483 tmp = priv->lec_arp_tables[place];
1484 to_add->next = NULL;
1485 if (tmp == NULL)
1486 priv->lec_arp_tables[place] = to_add;
1487
1488 else { /* add to the end */
1489 while (tmp->next)
1490 tmp = tmp->next;
1491 tmp->next = to_add;
1492 }
1493
1494 DPRINTK("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1495 0xff&to_add->mac_addr[0], 0xff&to_add->mac_addr[1],
1496 0xff&to_add->mac_addr[2], 0xff&to_add->mac_addr[3],
1497 0xff&to_add->mac_addr[4], 0xff&to_add->mac_addr[5]);
1498 }
1499
1500 /*
1501 * Remove entry from lec_arp_table
1502 */
1503 static int
1504 lec_arp_remove(struct lec_priv *priv,
1505 struct lec_arp_table *to_remove)
1506 {
1507 unsigned short place;
1508 struct lec_arp_table *tmp;
1509 int remove_vcc=1;
1510
1511 if (!to_remove) {
1512 return -1;
1513 }
1514 place = HASH(to_remove->mac_addr[ETH_ALEN-1]);
1515 tmp = priv->lec_arp_tables[place];
1516 if (tmp == to_remove) {
1517 priv->lec_arp_tables[place] = tmp->next;
1518 } else {
1519 while(tmp && tmp->next != to_remove) {
1520 tmp = tmp->next;
1521 }
1522 if (!tmp) {/* Entry was not found */
1523 return -1;
1524 }
1525 }
1526 tmp->next = to_remove->next;
1527 del_timer(&to_remove->timer);
1528
1529 /* If this is the only MAC connected to this VCC, also tear down
1530 the VCC */
1531 if (to_remove->status >= ESI_FLUSH_PENDING) {
1532 /*
1533 * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1534 */
1535 for(place = 0; place < LEC_ARP_TABLE_SIZE; place++) {
1536 for(tmp = priv->lec_arp_tables[place]; tmp != NULL; tmp = tmp->next) {
1537 if (memcmp(tmp->atm_addr, to_remove->atm_addr,
1538 ATM_ESA_LEN)==0) {
1539 remove_vcc=0;
1540 break;
1541 }
1542 }
1543 }
1544 if (remove_vcc)
1545 lec_arp_clear_vccs(to_remove);
1546 }
1547 skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
1548
1549 DPRINTK("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1550 0xff&to_remove->mac_addr[0], 0xff&to_remove->mac_addr[1],
1551 0xff&to_remove->mac_addr[2], 0xff&to_remove->mac_addr[3],
1552 0xff&to_remove->mac_addr[4], 0xff&to_remove->mac_addr[5]);
1553 return 0;
1554 }
1555
1556 #if DEBUG_ARP_TABLE
1557 static char*
1558 get_status_string(unsigned char st)
1559 {
1560 switch(st) {
1561 case ESI_UNKNOWN:
1562 return "ESI_UNKNOWN";
1563 case ESI_ARP_PENDING:
1564 return "ESI_ARP_PENDING";
1565 case ESI_VC_PENDING:
1566 return "ESI_VC_PENDING";
1567 case ESI_FLUSH_PENDING:
1568 return "ESI_FLUSH_PENDING";
1569 case ESI_FORWARD_DIRECT:
1570 return "ESI_FORWARD_DIRECT";
1571 default:
1572 return "<UNKNOWN>";
1573 }
1574 }
1575 #endif
1576
1577 static void
1578 dump_arp_table(struct lec_priv *priv)
1579 {
1580 #if DEBUG_ARP_TABLE
1581 int i,j, offset;
1582 struct lec_arp_table *rulla;
1583 char buf[1024];
1584 struct lec_arp_table **lec_arp_tables =
1585 (struct lec_arp_table **)priv->lec_arp_tables;
1586 struct lec_arp_table *lec_arp_empty_ones =
1587 (struct lec_arp_table *)priv->lec_arp_empty_ones;
1588 struct lec_arp_table *lec_no_forward =
1589 (struct lec_arp_table *)priv->lec_no_forward;
1590 struct lec_arp_table *mcast_fwds = priv->mcast_fwds;
1591
1592
1593 printk("Dump %p:\n",priv);
1594 for (i=0;i<LEC_ARP_TABLE_SIZE;i++) {
1595 rulla = lec_arp_tables[i];
1596 offset = 0;
1597 offset += sprintf(buf,"%d: %p\n",i, rulla);
1598 while (rulla) {
1599 offset += sprintf(buf+offset,"Mac:");
1600 for(j=0;j<ETH_ALEN;j++) {
1601 offset+=sprintf(buf+offset,
1602 "%2.2x ",
1603 rulla->mac_addr[j]&0xff);
1604 }
1605 offset +=sprintf(buf+offset,"Atm:");
1606 for(j=0;j<ATM_ESA_LEN;j++) {
1607 offset+=sprintf(buf+offset,
1608 "%2.2x ",
1609 rulla->atm_addr[j]&0xff);
1610 }
1611 offset+=sprintf(buf+offset,
1612 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1613 rulla->vcc?rulla->vcc->vpi:0,
1614 rulla->vcc?rulla->vcc->vci:0,
1615 rulla->recv_vcc?rulla->recv_vcc->vpi:0,
1616 rulla->recv_vcc?rulla->recv_vcc->vci:0,
1617 rulla->last_used,
1618 rulla->timestamp, rulla->no_tries);
1619 offset+=sprintf(buf+offset,
1620 "Flags:%x, Packets_flooded:%x, Status: %s ",
1621 rulla->flags, rulla->packets_flooded,
1622 get_status_string(rulla->status));
1623 offset+=sprintf(buf+offset,"->%p\n",rulla->next);
1624 rulla = rulla->next;
1625 }
1626 printk("%s",buf);
1627 }
1628 rulla = lec_no_forward;
1629 if (rulla)
1630 printk("No forward\n");
1631 while(rulla) {
1632 offset=0;
1633 offset += sprintf(buf+offset,"Mac:");
1634 for(j=0;j<ETH_ALEN;j++) {
1635 offset+=sprintf(buf+offset,"%2.2x ",
1636 rulla->mac_addr[j]&0xff);
1637 }
1638 offset +=sprintf(buf+offset,"Atm:");
1639 for(j=0;j<ATM_ESA_LEN;j++) {
1640 offset+=sprintf(buf+offset,"%2.2x ",
1641 rulla->atm_addr[j]&0xff);
1642 }
1643 offset+=sprintf(buf+offset,
1644 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1645 rulla->vcc?rulla->vcc->vpi:0,
1646 rulla->vcc?rulla->vcc->vci:0,
1647 rulla->recv_vcc?rulla->recv_vcc->vpi:0,
1648 rulla->recv_vcc?rulla->recv_vcc->vci:0,
1649 rulla->last_used,
1650 rulla->timestamp, rulla->no_tries);
1651 offset+=sprintf(buf+offset,
1652 "Flags:%x, Packets_flooded:%x, Status: %s ",
1653 rulla->flags, rulla->packets_flooded,
1654 get_status_string(rulla->status));
1655 offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next);
1656 rulla = rulla->next;
1657 printk("%s",buf);
1658 }
1659 rulla = lec_arp_empty_ones;
1660 if (rulla)
1661 printk("Empty ones\n");
1662 while(rulla) {
1663 offset=0;
1664 offset += sprintf(buf+offset,"Mac:");
1665 for(j=0;j<ETH_ALEN;j++) {
1666 offset+=sprintf(buf+offset,"%2.2x ",
1667 rulla->mac_addr[j]&0xff);
1668 }
1669 offset +=sprintf(buf+offset,"Atm:");
1670 for(j=0;j<ATM_ESA_LEN;j++) {
1671 offset+=sprintf(buf+offset,"%2.2x ",
1672 rulla->atm_addr[j]&0xff);
1673 }
1674 offset+=sprintf(buf+offset,
1675 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1676 rulla->vcc?rulla->vcc->vpi:0,
1677 rulla->vcc?rulla->vcc->vci:0,
1678 rulla->recv_vcc?rulla->recv_vcc->vpi:0,
1679 rulla->recv_vcc?rulla->recv_vcc->vci:0,
1680 rulla->last_used,
1681 rulla->timestamp, rulla->no_tries);
1682 offset+=sprintf(buf+offset,
1683 "Flags:%x, Packets_flooded:%x, Status: %s ",
1684 rulla->flags, rulla->packets_flooded,
1685 get_status_string(rulla->status));
1686 offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next);
1687 rulla = rulla->next;
1688 printk("%s",buf);
1689 }
1690
1691 rulla = mcast_fwds;
1692 if (rulla)
1693 printk("Multicast Forward VCCs\n");
1694 while(rulla) {
1695 offset=0;
1696 offset += sprintf(buf+offset,"Mac:");
1697 for(j=0;j<ETH_ALEN;j++) {
1698 offset+=sprintf(buf+offset,"%2.2x ",
1699 rulla->mac_addr[j]&0xff);
1700 }
1701 offset +=sprintf(buf+offset,"Atm:");
1702 for(j=0;j<ATM_ESA_LEN;j++) {
1703 offset+=sprintf(buf+offset,"%2.2x ",
1704 rulla->atm_addr[j]&0xff);
1705 }
1706 offset+=sprintf(buf+offset,
1707 "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1708 rulla->vcc?rulla->vcc->vpi:0,
1709 rulla->vcc?rulla->vcc->vci:0,
1710 rulla->recv_vcc?rulla->recv_vcc->vpi:0,
1711 rulla->recv_vcc?rulla->recv_vcc->vci:0,
1712 rulla->last_used,
1713 rulla->timestamp, rulla->no_tries);
1714 offset+=sprintf(buf+offset,
1715 "Flags:%x, Packets_flooded:%x, Status: %s ",
1716 rulla->flags, rulla->packets_flooded,
1717 get_status_string(rulla->status));
1718 offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next);
1719 rulla = rulla->next;
1720 printk("%s",buf);
1721 }
1722
1723 #endif
1724 }
1725
1726 /*
1727 * Destruction of arp-cache
1728 */
1729 static void
1730 lec_arp_destroy(struct lec_priv *priv)
1731 {
1732 unsigned long flags;
1733 struct lec_arp_table *entry, *next;
1734 int i;
1735
1736 del_timer_sync(&priv->lec_arp_timer);
1737
1738 /*
1739 * Remove all entries
1740 */
1741
1742 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1743 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1744 for(entry = priv->lec_arp_tables[i]; entry != NULL; entry=next) {
1745 next = entry->next;
1746 lec_arp_remove(priv, entry);
1747 kfree(entry);
1748 }
1749 }
1750 entry = priv->lec_arp_empty_ones;
1751 while(entry) {
1752 next = entry->next;
1753 del_timer_sync(&entry->timer);
1754 lec_arp_clear_vccs(entry);
1755 kfree(entry);
1756 entry = next;
1757 }
1758 priv->lec_arp_empty_ones = NULL;
1759 entry = priv->lec_no_forward;
1760 while(entry) {
1761 next = entry->next;
1762 del_timer_sync(&entry->timer);
1763 lec_arp_clear_vccs(entry);
1764 kfree(entry);
1765 entry = next;
1766 }
1767 priv->lec_no_forward = NULL;
1768 entry = priv->mcast_fwds;
1769 while(entry) {
1770 next = entry->next;
1771 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1772 lec_arp_clear_vccs(entry);
1773 kfree(entry);
1774 entry = next;
1775 }
1776 priv->mcast_fwds = NULL;
1777 priv->mcast_vcc = NULL;
1778 memset(priv->lec_arp_tables, 0,
1779 sizeof(struct lec_arp_table *) * LEC_ARP_TABLE_SIZE);
1780 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1781 }
1782
1783
1784 /*
1785 * Find entry by mac_address
1786 */
1787 static struct lec_arp_table*
1788 lec_arp_find(struct lec_priv *priv,
1789 unsigned char *mac_addr)
1790 {
1791 unsigned short place;
1792 struct lec_arp_table *to_return;
1793
1794 DPRINTK("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1795 mac_addr[0]&0xff, mac_addr[1]&0xff, mac_addr[2]&0xff,
1796 mac_addr[3]&0xff, mac_addr[4]&0xff, mac_addr[5]&0xff);
1797 place = HASH(mac_addr[ETH_ALEN-1]);
1798
1799 to_return = priv->lec_arp_tables[place];
1800 while(to_return) {
1801 if (!compare_ether_addr(mac_addr, to_return->mac_addr)) {
1802 return to_return;
1803 }
1804 to_return = to_return->next;
1805 }
1806 return NULL;
1807 }
1808
1809 static struct lec_arp_table*
1810 make_entry(struct lec_priv *priv, unsigned char *mac_addr)
1811 {
1812 struct lec_arp_table *to_return;
1813
1814 to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1815 if (!to_return) {
1816 printk("LEC: Arp entry kmalloc failed\n");
1817 return NULL;
1818 }
1819 memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
1820 init_timer(&to_return->timer);
1821 to_return->timer.function = lec_arp_expire_arp;
1822 to_return->timer.data = (unsigned long) to_return;
1823 to_return->last_used = jiffies;
1824 to_return->priv = priv;
1825 skb_queue_head_init(&to_return->tx_wait);
1826 return to_return;
1827 }
1828
1829 /*
1830 *
1831 * Arp sent timer expired
1832 *
1833 */
1834 static void
1835 lec_arp_expire_arp(unsigned long data)
1836 {
1837 struct lec_arp_table *entry;
1838
1839 entry = (struct lec_arp_table *)data;
1840
1841 DPRINTK("lec_arp_expire_arp\n");
1842 if (entry->status == ESI_ARP_PENDING) {
1843 if (entry->no_tries <= entry->priv->max_retry_count) {
1844 if (entry->is_rdesc)
1845 send_to_lecd(entry->priv, l_rdesc_arp_xmt, entry->mac_addr, NULL, NULL);
1846 else
1847 send_to_lecd(entry->priv, l_arp_xmt, entry->mac_addr, NULL, NULL);
1848 entry->no_tries++;
1849 }
1850 mod_timer(&entry->timer, jiffies + (1*HZ));
1851 }
1852 }
1853
1854 /*
1855 *
1856 * Unknown/unused vcc expire, remove associated entry
1857 *
1858 */
1859 static void
1860 lec_arp_expire_vcc(unsigned long data)
1861 {
1862 unsigned long flags;
1863 struct lec_arp_table *to_remove = (struct lec_arp_table*)data;
1864 struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
1865 struct lec_arp_table *entry = NULL;
1866
1867 del_timer(&to_remove->timer);
1868
1869 DPRINTK("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
1870 to_remove, priv,
1871 to_remove->vcc?to_remove->recv_vcc->vpi:0,
1872 to_remove->vcc?to_remove->recv_vcc->vci:0);
1873 DPRINTK("eo:%p nf:%p\n",priv->lec_arp_empty_ones,priv->lec_no_forward);
1874
1875 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1876 if (to_remove == priv->lec_arp_empty_ones)
1877 priv->lec_arp_empty_ones = to_remove->next;
1878 else {
1879 entry = priv->lec_arp_empty_ones;
1880 while (entry && entry->next != to_remove)
1881 entry = entry->next;
1882 if (entry)
1883 entry->next = to_remove->next;
1884 }
1885 if (!entry) {
1886 if (to_remove == priv->lec_no_forward) {
1887 priv->lec_no_forward = to_remove->next;
1888 } else {
1889 entry = priv->lec_no_forward;
1890 while (entry && entry->next != to_remove)
1891 entry = entry->next;
1892 if (entry)
1893 entry->next = to_remove->next;
1894 }
1895 }
1896 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1897
1898 lec_arp_clear_vccs(to_remove);
1899 kfree(to_remove);
1900 }
1901
1902 /*
1903 * Expire entries.
1904 * 1. Re-set timer
1905 * 2. For each entry, delete entries that have aged past the age limit.
1906 * 3. For each entry, depending on the status of the entry, perform
1907 * the following maintenance.
1908 * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1909 * tick_count is above the max_unknown_frame_time, clear
1910 * the tick_count to zero and clear the packets_flooded counter
1911 * to zero. This supports the packet rate limit per address
1912 * while flooding unknowns.
1913 * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1914 * than or equal to the path_switching_delay, change the status
1915 * to ESI_FORWARD_DIRECT. This causes the flush period to end
1916 * regardless of the progress of the flush protocol.
1917 */
1918 static void
1919 lec_arp_check_expire(unsigned long data)
1920 {
1921 unsigned long flags;
1922 struct lec_priv *priv = (struct lec_priv *)data;
1923 struct lec_arp_table *entry, *next;
1924 unsigned long now;
1925 unsigned long time_to_check;
1926 int i;
1927
1928 DPRINTK("lec_arp_check_expire %p\n",priv);
1929 DPRINTK("expire: eo:%p nf:%p\n",priv->lec_arp_empty_ones,
1930 priv->lec_no_forward);
1931 now = jiffies;
1932 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1933 for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1934 for(entry = priv->lec_arp_tables[i]; entry != NULL; ) {
1935 if ((entry->flags) & LEC_REMOTE_FLAG &&
1936 priv->topology_change)
1937 time_to_check = priv->forward_delay_time;
1938 else
1939 time_to_check = priv->aging_time;
1940
1941 DPRINTK("About to expire: %lx - %lx > %lx\n",
1942 now,entry->last_used, time_to_check);
1943 if( time_after(now, entry->last_used+
1944 time_to_check) &&
1945 !(entry->flags & LEC_PERMANENT_FLAG) &&
1946 !(entry->mac_addr[0] & 0x01) ) { /* LANE2: 7.1.20 */
1947 /* Remove entry */
1948 DPRINTK("LEC:Entry timed out\n");
1949 next = entry->next;
1950 lec_arp_remove(priv, entry);
1951 kfree(entry);
1952 entry = next;
1953 } else {
1954 /* Something else */
1955 if ((entry->status == ESI_VC_PENDING ||
1956 entry->status == ESI_ARP_PENDING)
1957 && time_after_eq(now,
1958 entry->timestamp +
1959 priv->max_unknown_frame_time)) {
1960 entry->timestamp = jiffies;
1961 entry->packets_flooded = 0;
1962 if (entry->status == ESI_VC_PENDING)
1963 send_to_lecd(priv, l_svc_setup, entry->mac_addr, entry->atm_addr, NULL);
1964 }
1965 if (entry->status == ESI_FLUSH_PENDING
1966 &&
1967 time_after_eq(now, entry->timestamp+
1968 priv->path_switching_delay)) {
1969 struct sk_buff *skb;
1970
1971 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
1972 lec_send(entry->vcc, skb, entry->priv);
1973 entry->last_used = jiffies;
1974 entry->status =
1975 ESI_FORWARD_DIRECT;
1976 }
1977 entry = entry->next;
1978 }
1979 }
1980 }
1981 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1982
1983 mod_timer(&priv->lec_arp_timer, jiffies + LEC_ARP_REFRESH_INTERVAL);
1984 }
1985 /*
1986 * Try to find vcc where mac_address is attached.
1987 *
1988 */
1989 static struct atm_vcc*
1990 lec_arp_resolve(struct lec_priv *priv, unsigned char *mac_to_find,
1991 int is_rdesc, struct lec_arp_table **ret_entry)
1992 {
1993 unsigned long flags;
1994 struct lec_arp_table *entry;
1995 struct atm_vcc *found;
1996
1997 if (mac_to_find[0] & 0x01) {
1998 switch (priv->lane_version) {
1999 case 1:
2000 return priv->mcast_vcc;
2001 break;
2002 case 2: /* LANE2 wants arp for multicast addresses */
2003 if (!compare_ether_addr(mac_to_find, bus_mac))
2004 return priv->mcast_vcc;
2005 break;
2006 default:
2007 break;
2008 }
2009 }
2010
2011 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2012 entry = lec_arp_find(priv, mac_to_find);
2013
2014 if (entry) {
2015 if (entry->status == ESI_FORWARD_DIRECT) {
2016 /* Connection Ok */
2017 entry->last_used = jiffies;
2018 *ret_entry = entry;
2019 found = entry->vcc;
2020 goto out;
2021 }
2022 /* If the LE_ARP cache entry is still pending, reset count to 0
2023 * so another LE_ARP request can be made for this frame.
2024 */
2025 if (entry->status == ESI_ARP_PENDING) {
2026 entry->no_tries = 0;
2027 }
2028 /* Data direct VC not yet set up, check to see if the unknown
2029 frame count is greater than the limit. If the limit has
2030 not been reached, allow the caller to send packet to
2031 BUS. */
2032 if (entry->status != ESI_FLUSH_PENDING &&
2033 entry->packets_flooded<priv->maximum_unknown_frame_count) {
2034 entry->packets_flooded++;
2035 DPRINTK("LEC_ARP: Flooding..\n");
2036 found = priv->mcast_vcc;
2037 goto out;
2038 }
2039 /* We got here because entry->status == ESI_FLUSH_PENDING
2040 * or BUS flood limit was reached for an entry which is
2041 * in ESI_ARP_PENDING or ESI_VC_PENDING state.
2042 */
2043 *ret_entry = entry;
2044 DPRINTK("lec: entry->status %d entry->vcc %p\n", entry->status, entry->vcc);
2045 found = NULL;
2046 } else {
2047 /* No matching entry was found */
2048 entry = make_entry(priv, mac_to_find);
2049 DPRINTK("LEC_ARP: Making entry\n");
2050 if (!entry) {
2051 found = priv->mcast_vcc;
2052 goto out;
2053 }
2054 lec_arp_add(priv, entry);
2055 /* We want arp-request(s) to be sent */
2056 entry->packets_flooded =1;
2057 entry->status = ESI_ARP_PENDING;
2058 entry->no_tries = 1;
2059 entry->last_used = entry->timestamp = jiffies;
2060 entry->is_rdesc = is_rdesc;
2061 if (entry->is_rdesc)
2062 send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, NULL);
2063 else
2064 send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
2065 entry->timer.expires = jiffies + (1*HZ);
2066 entry->timer.function = lec_arp_expire_arp;
2067 add_timer(&entry->timer);
2068 found = priv->mcast_vcc;
2069 }
2070
2071 out:
2072 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2073 return found;
2074 }
2075
2076 static int
2077 lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
2078 unsigned long permanent)
2079 {
2080 unsigned long flags;
2081 struct lec_arp_table *entry, *next;
2082 int i;
2083
2084 DPRINTK("lec_addr_delete\n");
2085 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2086 for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2087 for(entry = priv->lec_arp_tables[i]; entry != NULL; entry = next) {
2088 next = entry->next;
2089 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)
2090 && (permanent ||
2091 !(entry->flags & LEC_PERMANENT_FLAG))) {
2092 lec_arp_remove(priv, entry);
2093 kfree(entry);
2094 }
2095 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2096 return 0;
2097 }
2098 }
2099 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2100 return -1;
2101 }
2102
2103 /*
2104 * Notifies: Response to arp_request (atm_addr != NULL)
2105 */
2106 static void
2107 lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
2108 unsigned char *atm_addr, unsigned long remoteflag,
2109 unsigned int targetless_le_arp)
2110 {
2111 unsigned long flags;
2112 struct lec_arp_table *entry, *tmp;
2113 int i;
2114
2115 DPRINTK("lec:%s", (targetless_le_arp) ? "targetless ": " ");
2116 DPRINTK("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2117 mac_addr[0],mac_addr[1],mac_addr[2],mac_addr[3],
2118 mac_addr[4],mac_addr[5]);
2119
2120 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2121 entry = lec_arp_find(priv, mac_addr);
2122 if (entry == NULL && targetless_le_arp)
2123 goto out; /* LANE2: ignore targetless LE_ARPs for which
2124 * we have no entry in the cache. 7.1.30
2125 */
2126 if (priv->lec_arp_empty_ones) {
2127 entry = priv->lec_arp_empty_ones;
2128 if (!memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN)) {
2129 priv->lec_arp_empty_ones = entry->next;
2130 } else {
2131 while(entry->next && memcmp(entry->next->atm_addr,
2132 atm_addr, ATM_ESA_LEN))
2133 entry = entry->next;
2134 if (entry->next) {
2135 tmp = entry;
2136 entry = entry->next;
2137 tmp->next = entry->next;
2138 } else
2139 entry = NULL;
2140
2141 }
2142 if (entry) {
2143 del_timer(&entry->timer);
2144 tmp = lec_arp_find(priv, mac_addr);
2145 if (tmp) {
2146 del_timer(&tmp->timer);
2147 tmp->status = ESI_FORWARD_DIRECT;
2148 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
2149 tmp->vcc = entry->vcc;
2150 tmp->old_push = entry->old_push;
2151 tmp->last_used = jiffies;
2152 del_timer(&entry->timer);
2153 kfree(entry);
2154 entry=tmp;
2155 } else {
2156 entry->status = ESI_FORWARD_DIRECT;
2157 memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
2158 entry->last_used = jiffies;
2159 lec_arp_add(priv, entry);
2160 }
2161 if (remoteflag)
2162 entry->flags|=LEC_REMOTE_FLAG;
2163 else
2164 entry->flags&=~LEC_REMOTE_FLAG;
2165 DPRINTK("After update\n");
2166 dump_arp_table(priv);
2167 goto out;
2168 }
2169 }
2170 entry = lec_arp_find(priv, mac_addr);
2171 if (!entry) {
2172 entry = make_entry(priv, mac_addr);
2173 if (!entry)
2174 goto out;
2175 entry->status = ESI_UNKNOWN;
2176 lec_arp_add(priv, entry);
2177 /* Temporary, changes before end of function */
2178 }
2179 memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
2180 del_timer(&entry->timer);
2181 for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2182 for(tmp = priv->lec_arp_tables[i]; tmp; tmp=tmp->next) {
2183 if (entry != tmp &&
2184 !memcmp(tmp->atm_addr, atm_addr,
2185 ATM_ESA_LEN)) {
2186 /* Vcc to this host exists */
2187 if (tmp->status > ESI_VC_PENDING) {
2188 /*
2189 * ESI_FLUSH_PENDING,
2190 * ESI_FORWARD_DIRECT
2191 */
2192 entry->vcc = tmp->vcc;
2193 entry->old_push=tmp->old_push;
2194 }
2195 entry->status=tmp->status;
2196 break;
2197 }
2198 }
2199 }
2200 if (remoteflag)
2201 entry->flags|=LEC_REMOTE_FLAG;
2202 else
2203 entry->flags&=~LEC_REMOTE_FLAG;
2204 if (entry->status == ESI_ARP_PENDING ||
2205 entry->status == ESI_UNKNOWN) {
2206 entry->status = ESI_VC_PENDING;
2207 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
2208 }
2209 DPRINTK("After update2\n");
2210 dump_arp_table(priv);
2211 out:
2212 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2213 }
2214
2215 /*
2216 * Notifies: Vcc setup ready
2217 */
2218 static void
2219 lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
2220 struct atm_vcc *vcc,
2221 void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb))
2222 {
2223 unsigned long flags;
2224 struct lec_arp_table *entry;
2225 int i, found_entry=0;
2226
2227 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2228 if (ioc_data->receive == 2) {
2229 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
2230
2231 DPRINTK("LEC_ARP: Attaching mcast forward\n");
2232 #if 0
2233 entry = lec_arp_find(priv, bus_mac);
2234 if (!entry) {
2235 printk("LEC_ARP: Multicast entry not found!\n");
2236 goto out;
2237 }
2238 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2239 entry->recv_vcc = vcc;
2240 entry->old_recv_push = old_push;
2241 #endif
2242 entry = make_entry(priv, bus_mac);
2243 if (entry == NULL)
2244 goto out;
2245 del_timer(&entry->timer);
2246 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2247 entry->recv_vcc = vcc;
2248 entry->old_recv_push = old_push;
2249 entry->next = priv->mcast_fwds;
2250 priv->mcast_fwds = entry;
2251 goto out;
2252 } else if (ioc_data->receive == 1) {
2253 /* Vcc which we don't want to make default vcc, attach it
2254 anyway. */
2255 DPRINTK("LEC_ARP:Attaching data direct, not default :%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2256 ioc_data->atm_addr[0],ioc_data->atm_addr[1],
2257 ioc_data->atm_addr[2],ioc_data->atm_addr[3],
2258 ioc_data->atm_addr[4],ioc_data->atm_addr[5],
2259 ioc_data->atm_addr[6],ioc_data->atm_addr[7],
2260 ioc_data->atm_addr[8],ioc_data->atm_addr[9],
2261 ioc_data->atm_addr[10],ioc_data->atm_addr[11],
2262 ioc_data->atm_addr[12],ioc_data->atm_addr[13],
2263 ioc_data->atm_addr[14],ioc_data->atm_addr[15],
2264 ioc_data->atm_addr[16],ioc_data->atm_addr[17],
2265 ioc_data->atm_addr[18],ioc_data->atm_addr[19]);
2266 entry = make_entry(priv, bus_mac);
2267 if (entry == NULL)
2268 goto out;
2269 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2270 memset(entry->mac_addr, 0, ETH_ALEN);
2271 entry->recv_vcc = vcc;
2272 entry->old_recv_push = old_push;
2273 entry->status = ESI_UNKNOWN;
2274 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2275 entry->timer.function = lec_arp_expire_vcc;
2276 add_timer(&entry->timer);
2277 entry->next = priv->lec_no_forward;
2278 priv->lec_no_forward = entry;
2279 dump_arp_table(priv);
2280 goto out;
2281 }
2282 DPRINTK("LEC_ARP:Attaching data direct, default:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2283 ioc_data->atm_addr[0],ioc_data->atm_addr[1],
2284 ioc_data->atm_addr[2],ioc_data->atm_addr[3],
2285 ioc_data->atm_addr[4],ioc_data->atm_addr[5],
2286 ioc_data->atm_addr[6],ioc_data->atm_addr[7],
2287 ioc_data->atm_addr[8],ioc_data->atm_addr[9],
2288 ioc_data->atm_addr[10],ioc_data->atm_addr[11],
2289 ioc_data->atm_addr[12],ioc_data->atm_addr[13],
2290 ioc_data->atm_addr[14],ioc_data->atm_addr[15],
2291 ioc_data->atm_addr[16],ioc_data->atm_addr[17],
2292 ioc_data->atm_addr[18],ioc_data->atm_addr[19]);
2293 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2294 for (entry = priv->lec_arp_tables[i]; entry; entry=entry->next) {
2295 if (memcmp(ioc_data->atm_addr, entry->atm_addr,
2296 ATM_ESA_LEN)==0) {
2297 DPRINTK("LEC_ARP: Attaching data direct\n");
2298 DPRINTK("Currently -> Vcc: %d, Rvcc:%d\n",
2299 entry->vcc?entry->vcc->vci:0,
2300 entry->recv_vcc?entry->recv_vcc->vci:0);
2301 found_entry=1;
2302 del_timer(&entry->timer);
2303 entry->vcc = vcc;
2304 entry->old_push = old_push;
2305 if (entry->status == ESI_VC_PENDING) {
2306 if(priv->maximum_unknown_frame_count
2307 ==0)
2308 entry->status =
2309 ESI_FORWARD_DIRECT;
2310 else {
2311 entry->timestamp = jiffies;
2312 entry->status =
2313 ESI_FLUSH_PENDING;
2314 #if 0
2315 send_to_lecd(priv,l_flush_xmt,
2316 NULL,
2317 entry->atm_addr,
2318 NULL);
2319 #endif
2320 }
2321 } else {
2322 /* They were forming a connection
2323 to us, and we to them. Our
2324 ATM address is numerically lower
2325 than theirs, so we make connection
2326 we formed into default VCC (8.1.11).
2327 Connection they made gets torn
2328 down. This might confuse some
2329 clients. Can be changed if
2330 someone reports trouble... */
2331 ;
2332 }
2333 }
2334 }
2335 }
2336 if (found_entry) {
2337 DPRINTK("After vcc was added\n");
2338 dump_arp_table(priv);
2339 goto out;
2340 }
2341 /* Not found, snatch address from first data packet that arrives from
2342 this vcc */
2343 entry = make_entry(priv, bus_mac);
2344 if (!entry)
2345 goto out;
2346 entry->vcc = vcc;
2347 entry->old_push = old_push;
2348 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2349 memset(entry->mac_addr, 0, ETH_ALEN);
2350 entry->status = ESI_UNKNOWN;
2351 entry->next = priv->lec_arp_empty_ones;
2352 priv->lec_arp_empty_ones = entry;
2353 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2354 entry->timer.function = lec_arp_expire_vcc;
2355 add_timer(&entry->timer);
2356 DPRINTK("After vcc was added\n");
2357 dump_arp_table(priv);
2358 out:
2359 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2360 }
2361
2362 static void
2363 lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2364 {
2365 unsigned long flags;
2366 struct lec_arp_table *entry;
2367 int i;
2368
2369 DPRINTK("LEC:lec_flush_complete %lx\n",tran_id);
2370 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2371 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2372 for (entry = priv->lec_arp_tables[i]; entry; entry=entry->next) {
2373 if (entry->flush_tran_id == tran_id &&
2374 entry->status == ESI_FLUSH_PENDING) {
2375 struct sk_buff *skb;
2376
2377 while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
2378 lec_send(entry->vcc, skb, entry->priv);
2379 entry->status = ESI_FORWARD_DIRECT;
2380 DPRINTK("LEC_ARP: Flushed\n");
2381 }
2382 }
2383 }
2384 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2385 dump_arp_table(priv);
2386 }
2387
2388 static void
2389 lec_set_flush_tran_id(struct lec_priv *priv,
2390 unsigned char *atm_addr, unsigned long tran_id)
2391 {
2392 unsigned long flags;
2393 struct lec_arp_table *entry;
2394 int i;
2395
2396 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2397 for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2398 for(entry = priv->lec_arp_tables[i]; entry; entry=entry->next)
2399 if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2400 entry->flush_tran_id = tran_id;
2401 DPRINTK("Set flush transaction id to %lx for %p\n",tran_id,entry);
2402 }
2403 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2404 }
2405
2406 static int
2407 lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2408 {
2409 unsigned long flags;
2410 unsigned char mac_addr[] = {
2411 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
2412 struct lec_arp_table *to_add;
2413 struct lec_vcc_priv *vpriv;
2414 int err = 0;
2415
2416 if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
2417 return -ENOMEM;
2418 vpriv->xoff = 0;
2419 vpriv->old_pop = vcc->pop;
2420 vcc->user_back = vpriv;
2421 vcc->pop = lec_pop;
2422 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2423 to_add = make_entry(priv, mac_addr);
2424 if (!to_add) {
2425 vcc->pop = vpriv->old_pop;
2426 kfree(vpriv);
2427 err = -ENOMEM;
2428 goto out;
2429 }
2430 memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2431 to_add->status = ESI_FORWARD_DIRECT;
2432 to_add->flags |= LEC_PERMANENT_FLAG;
2433 to_add->vcc = vcc;
2434 to_add->old_push = vcc->push;
2435 vcc->push = lec_push;
2436 priv->mcast_vcc = vcc;
2437 lec_arp_add(priv, to_add);
2438 out:
2439 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2440 return err;
2441 }
2442
2443 static void
2444 lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2445 {
2446 unsigned long flags;
2447 struct lec_arp_table *entry, *next;
2448 int i;
2449
2450 DPRINTK("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n",vcc->vpi,vcc->vci);
2451 dump_arp_table(priv);
2452 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2453 for(i=0;i<LEC_ARP_TABLE_SIZE;i++) {
2454 for(entry = priv->lec_arp_tables[i];entry; entry=next) {
2455 next = entry->next;
2456 if (vcc == entry->vcc) {
2457 lec_arp_remove(priv, entry);
2458 kfree(entry);
2459 if (priv->mcast_vcc == vcc) {
2460 priv->mcast_vcc = NULL;
2461 }
2462 }
2463 }
2464 }
2465
2466 entry = priv->lec_arp_empty_ones;
2467 priv->lec_arp_empty_ones = NULL;
2468 while (entry != NULL) {
2469 next = entry->next;
2470 if (entry->vcc == vcc) { /* leave it out from the list */
2471 lec_arp_clear_vccs(entry);
2472 del_timer(&entry->timer);
2473 kfree(entry);
2474 }
2475 else { /* put it back to the list */
2476 entry->next = priv->lec_arp_empty_ones;
2477 priv->lec_arp_empty_ones = entry;
2478 }
2479 entry = next;
2480 }
2481
2482 entry = priv->lec_no_forward;
2483 priv->lec_no_forward = NULL;
2484 while (entry != NULL) {
2485 next = entry->next;
2486 if (entry->recv_vcc == vcc) {
2487 lec_arp_clear_vccs(entry);
2488 del_timer(&entry->timer);
2489 kfree(entry);
2490 }
2491 else {
2492 entry->next = priv->lec_no_forward;
2493 priv->lec_no_forward = entry;
2494 }
2495 entry = next;
2496 }
2497
2498 entry = priv->mcast_fwds;
2499 priv->mcast_fwds = NULL;
2500 while (entry != NULL) {
2501 next = entry->next;
2502 if (entry->recv_vcc == vcc) {
2503 lec_arp_clear_vccs(entry);
2504 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2505 kfree(entry);
2506 }
2507 else {
2508 entry->next = priv->mcast_fwds;
2509 priv->mcast_fwds = entry;
2510 }
2511 entry = next;
2512 }
2513
2514 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2515 dump_arp_table(priv);
2516 }
2517
2518 static void
2519 lec_arp_check_empties(struct lec_priv *priv,
2520 struct atm_vcc *vcc, struct sk_buff *skb)
2521 {
2522 unsigned long flags;
2523 struct lec_arp_table *entry, *prev;
2524 struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2525 unsigned char *src;
2526 #ifdef CONFIG_TR
2527 struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
2528
2529 if (priv->is_trdev) src = tr_hdr->h_source;
2530 else
2531 #endif
2532 src = hdr->h_source;
2533
2534 spin_lock_irqsave(&priv->lec_arp_lock, flags);
2535 entry = priv->lec_arp_empty_ones;
2536 if (vcc == entry->vcc) {
2537 del_timer(&entry->timer);
2538 memcpy(entry->mac_addr, src, ETH_ALEN);
2539 entry->status = ESI_FORWARD_DIRECT;
2540 entry->last_used = jiffies;
2541 priv->lec_arp_empty_ones = entry->next;
2542 /* We might have got an entry */
2543 if ((prev = lec_arp_find(priv,src))) {
2544 lec_arp_remove(priv, prev);
2545 kfree(prev);
2546 }
2547 lec_arp_add(priv, entry);
2548 goto out;
2549 }
2550 prev = entry;
2551 entry = entry->next;
2552 while (entry && entry->vcc != vcc) {
2553 prev= entry;
2554 entry = entry->next;
2555 }
2556 if (!entry) {
2557 DPRINTK("LEC_ARP: Arp_check_empties: entry not found!\n");
2558 goto out;
2559 }
2560 del_timer(&entry->timer);
2561 memcpy(entry->mac_addr, src, ETH_ALEN);
2562 entry->status = ESI_FORWARD_DIRECT;
2563 entry->last_used = jiffies;
2564 prev->next = entry->next;
2565 if ((prev = lec_arp_find(priv, src))) {
2566 lec_arp_remove(priv, prev);
2567 kfree(prev);
2568 }
2569 lec_arp_add(priv, entry);
2570 out:
2571 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2572 }
2573 MODULE_LICENSE("GPL");
Mirror of the linux-mips.org kernel tree